timing tuning problem

[jondee86]

www.ae86.hu/2008/04/06/jeremy-ross-lifting-the-lid-on-the-mk1-mr2-ecu/

If you follow this link from another thread, and download the PDF
file, on Page 12 you will see an Ignition Timing Table. This table
graphs load against ignition timing advance in non-defined units.

If you consider the 5600 rpm line and compare the maximum and
minimum values, you will see that at WOT (full load) the number of
units is 144. At minimum load (in neutral gear) the number of units
is 207. The ECU adds timing as the load comes off the engine, to
compensate for the changing burn characteristics of the weaker
mixture.

From this information, it is easy to see that if the timing was 30 deg
at 5600 rpm and WOT; without load the timing could increase to
40 deg or more. An example of when this would happen, is lifting
off the throttle between corners, to avoid making an up change and
a down change very close together.

Cheers... jondee86